Are polychlorinated biphenyl residues adequately described by Aroclor mixture equivalents? Isomer-specific principal components analysis of such residues in fish and turtles

PCB residues from fish and turtles were analyzed with SIMCA (soft independent modeling of class a anology). A series of technical aroclors were also analyzed to provide a reference data set for pattern recognition. The similarity of aroclors to class models derived for fish and turtles was assessed and revealed that the pcp residues in the samples could not be described by an Aroclor or Aroclor mixture.